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Question

'Heart of heart' is

A
SA node
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B
AV node
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C
Bundle of His
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D
Purkinje fibres.
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Solution

The correct option is A SA node
    • The heart is a muscular organ made up of specialized muscles called cardiac muscles.
    • These muscles show continuous contraction and relaxation.
    • This contraction results from an electrical impulse that originates in a node called the sinoatrial, or SA node.
    • This node is in the upper right corner of the right auricle and sets a rhythm for the contractions and relaxations of the heart.
    • Hence, it is also referred to as a natural pacemaker or 'Heart of heart'.

    So, the correct answer is option A.

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